Articles by Michael Luo

In the wake of the shootings in Tucson, Ariz., the familiar questions inevitably resurfaced: Are communities where more people carry guns safer or less safe? Does the availability of high-capacity magazines increase deaths? Do more rigorous background checks make a difference?

Johnny R. Williams, 30, would appear to be an unlikely person to have to fret about the impact of race on his job search, with companies like JPMorgan Chase and an M.B.A. from the University of Chicago on his resume.

Lawmakers began weighing ways Monday to prevent more tragedies on college campuses in a hastily convened Senate hearing a week after the shootings in Virginia. The hearing explored the adequacy of campus' mental health resources, security plans and communications systems.